Drawing frame with adjustable holder for the pressure rollers



Dec. 29, 1942. E. TOENNIESSEN 2,306,849

DRAWING FRAME WITH ADJUSTABLE HOLDER FOR THE PRESSURE ROLLERS FiledSept. 23. 1940 Patented Dec. 29, 1942 DRAWING FRAME WITH .ADJUSTABLEHOLDER FOR THE PRESSURE ROLLERS Ernst Toenniessen, Munich, Germany;vested in the Alien Property Custodian Application September 23, 1940,Serial No. 358,023 In Germany November 24, 1939 Claims.

1 The invention relates to a drawing frame for textile rovings andspinning machines, which is provided with a number of pairs of rollers,acting alone or in cooperation with endless belts.

One object of the invention is to simplify adjustment of the drawingframe and to provide an improved apparatus comprising a transverse barwhich extends throughout the entire drawing frame in the direction ofthe roller axes, said bar and the displaceable element of the holder forthe pressure rollers being provided with cooperating means for fixingthe position of the displaceable elements of the holders.

.Another object of the invention is to provide an improved apparatuswherein th elements of the holder for the pressure rollers can easily bedisposed and adjusted without loosening clamping means and use ofgauges.

A further object of the present invention is to provide an improvedapparatus, wherein the holder for the pressure rollers is hinged in openbearings, allowing the radial removal of the holder from its bearing,but wherein the holder at the same time is secured against radialdisplacement when in the operative position, thus preventingmis-alignment of neighbored rollers in the direction of their axes.

A further object of the invention is to construct the holder for thepressure rollers in such a manner that the clamping means fordisplaceable elements of the support for the lower rollers, areaccessible from above without previous lifting or removal of the holder,thus equally facilitating the adjusting of the drawing frame.

Several embodiments of the drawing frame according to the invention areshown by way of example in the accompanying drawing, in which Fig. 1shows in side elevation a drawing frame with section through the bearingbolt of the holder for the pressure rollers on line I-I of Fig. 2.

Fig. 2 shows the holder for the pressure rollers alone viewed fromabove, the bearing point being shown in cross-section on line IIII ofFig. 1,

Figs. 3, 4 and 5 show in side elevation modified forms of constructionof the bearing point of the holder for the pressure rollers.

On the drawing frame shown in Fig. 1 a pair of drawing rolls isdesignated by |I, a pair of middle rollers by 2II, and a pair of feedrollers by 3III. The lower rollers II, III are mounted in a slide 4,which is adjustable on the stationary upright frame 5 so that itsdistance relative to the lower drawing roller I may be adjusted. Thepressure rollers I, 2, 3 are journalled in usual manner on the lateralcutout portions of a holder of the pressure rollers which is composed oftwo parts 6 and 1. These two parts of the holder for the pressurerollers are mounted one on the other and are freely shiftable in theirlongitudinal direction, the front part 1 of the holder for the over theupright frame 5.

pressure rollers being guided at its rear end in the front end of part6. The movement of the two parts in longitudinal direction is limited bya pin 8 fixed in part 6 and projecting through a longitudinal slot 9 inthe other part I. A brake spring I0 is further sunk in the part 6, thehead I I of this spring pressing against the part I and ensuring asuflicient braking of the two parts.

A reversing bar 2 is mounted between the lower rollers I, II on thestationary upright frame 5 and has a heart-shaped cross-section andforms the front bearing for a belt l3 which extends from the reversingbar l2 downwards over a stretching means l4 and thence upwards over themiddle lower roller II. On the front part 1 of the holder of thepressure rollers a passage element I5 is further mounted above thereversing bar I2. An abutment pin I6 is fixed in the upright frame 5 andprojects through the reversing bar I2 so that its upper end engages in anotch formed on the front part I of th holder of the pressure rollers.This part has further a scale IS on its top.

The rear end IQ of the holder of the pressure rollers is hinged on theslide 4 in a bearing 20 constructed as a forked head. The hinge bolt 2|-of the bearing is rigidly connected with the holder of the pressurerollers, and On the rear end IQ of part B a clamping slit 22 and aclamping screw 23 are provided which effect clamping of the hinge bolt2|. The counter-bearing 20 has on each of its cheeks engaging over theholder of pressure rollers a horizontal slot 24, whereas the hinge bolt2| within the range of these cheeks of the counter-bearing 20 hasnotches 25 which are of a depth so that the cross-section of the hingebolt on line 1-1 of Fig. 2 remaining between them fits into the slot 24.If therefore the holder 6, 1 of the pressure rollers is swung from theposition shown in Fig. 1 in a clockwise direction of in an upwarddirection, the holder together with the bolt 2| mounted on it can bepulled out of the bearing 20, unless the holder of the pressure rollersstrikes with its rear end face in the swung out position against anabutment face 26 of the slide 4.

The slide 5 is clamped by means of a clamping screw 21 on the uprightframe 5, the screw extending through the body of the slide and isscrewed at its lower end into anut 28 engaging The rear part 6 of theholder of the pressure rollers has a bore 29 so that it is possible togrip the head of the clamping screw Z'l, without lifting the holder ofthe pressure rollers, by a wrench, socket-v wrench or the like.

If the drawing frame requires adjustment, it is merely necessary toloosen with the aid of a socket wrench. the clamping screw 2'! and tothen shift, while observing the scale l8, the

slide 4 and the part of the holder of the pressure rollers mounted onthe slide in a forward or rearward direction until the desired distancebetween the pair of middle rollers 2II and the pair of drawing rollersl-I is had. During this adjusting the front part i of the holder of thepressure rollers remains permanently in its position secured by theabutment pin Hi. If the drawing frame is situated very high or if forother reasons the scale 18 cannot be well observed in the workingposition of the holder of the pressure rollers, the adjusting of theparts may be carried out so that first the holder of the pressurerollers is raised and lifted out of its bearing, the correct adjustingbeing then effected with theaid of the scale it, whereupon the holder ofthe pressure rollers is inserted again into its bearing and the slide i,which has previously been loosened, together with the holder of thepressure rollers is shifted forward or backward until the notch l! ofthe holder of the pressure rollers engages over the abutment pin I6.After tightening of the clamping screw 21 the elements are in thecorrectly adjusted position.

In the form of construction shown in Fig. 3 the slots 36 in the sidecheeks of the counterbearing 26 mounted in the slide 4 are open at thetop, whereas the bolt 3! at the rear end of the holder 32 of thepressure rollers is tightened by means of the clamping screw 33 sosecurely that the bolt cross-section fitting the slots 30 is inhorizontal position when the holder of the pressure rollers is in theoperative position. Also in this arrangement the parts can be separatedthe one from the other after the holder of the pressure rollers has beenturned by 90, it being merely necessary to lift the holder of thepressure rollers in an upward direction.

In the form of construction shown in Fig. 4 the slots 3% of thecounter-bearing 20 are of a width equal to the thickness of bolt 35, thebolt being tightened at the end 35 of the holder of the pressure rollersby means of the clamping screw 37. The bolt is held in position by aspring 38 which, when the holder of the pressure rollers is lifted, isforced out of its locking position.

In the form of construction shown in Fig. it is assumed that the bolt 39has to remain permanently rigidly connected with the counterbearing ofthe holder 42 of the pressure rollers. The bolt 39 has transversenotches 40 according to the whole width of the holder of the pressurerollers, Whereas the holder of the pressure rollers has at its lower enda slot ll adapted to the remaining cross-section of the bolt, so thatthe parts can be separated the one from the other after the holder ofthe pressure rollers has been turned by 90.

According to the number of the units lying side by side in a drawingframe, two or more holders of pressure rollers can be clamped on acommon bearing axle so that several holders can simultaneously beremoved from their bearing points and reinserted. Holders of pressurerollers arranged side by side can also be mounted, in the solidconstruction shown in Fig. 5, on a common solid axle. So far as nounderframe is coordinated to the juxtaposed units, the holders can besupported at their front end directly on the reversing bar IE or on thelower feed roller I by a fork-shaped head open in a downward directionand secured against shifting.

The invention is not restricted to the details of the constructionsdescribed.

I claim:

1. A drawing'frame for textile rovings, comprising in combination, aplurality of pairs of rollers, each pair comprising an upper and a lowerroller, a support carrying said lower rollers, a holder having hingeconnection with said support and carrying said upper rollers, saidholder comprising two mutually shiftable parts, and brake means in oneof the parts and acting with pressure against the other part.

2. A drawing frame for textile rovings, comprising in combination aplurality of pairs of rollers, each pair comprising an upper and a lowerroller, a support carrying said lower rollers, and comprising astationary part and a slide displaceable thereon, a holder having hingeconnection with said support and carrying said upper rollers, saidholder comprising two mutually shiftable parts, brake means in one ofthe parts and acting with pressure against the other part, and a scaledirectly disposed on the surface of said one holder part for indicatingthe distance between neighbored pairs of rollers.

3. A drawing frame for textile rovings, comprising in combination, aplurality of pairs of rollers, each pair comprising an upper and a lowerroller, a pair of supports for positioning said lower rollers, each ofsaid supports comprising a stationary part and a slide displaceablethereon, a plurality of holders for positioning said upper rollers, saidholders being distant one from another whereby only two thereof 00-operate with said supports, and comprising two mutually shiftable parts,av transverse bar in said supports extending throughout the drawingframe in the direction of the roller axes, and cooperating means on saidtransverse bar and said holders for fixing the position of thedisplaceable holder parts relative to said transverse bar for theholders which are not cooperating with said supports.

4. A drawing frame for textile rovings, comprising in combination, aplurality of pairs of rollers, each pair comprising an upper and a lowerroller, a support carrying said lower rollers, a holder having hingeconnection with said support and carrying said upper rollers, one of thebearing parts of said hinge'connection having a horizontal cylindricalbore, the other bearing part of said hinge connection having a hinge pinreceived in said bore, said bore having a circumferential radial slitthe width of which is less than the diameter of said bore, said hingepin having depressions on its circumference for adapting the width ofthe remaining section of the hinge pin to the width of said radial slit,the latter affording passage to the hinge pin when the holder is inoperative position.

5. A drawing frame for textile rovings, comprising in combination aplurality of pairs of' rollers, each pair comprising an upper and alower roller, a support for positioning said lower rollers comprising astationary part and a slide displaceable thereon,' a screw extendingfrom ,above and throughout the slide, clamping means cooperating withthe lower end of said screw, and secured on said support and againstrotation and forming a screw nut, and a holder having hinge connectionwith said support and carryj ing said upper rollers, and having avertical bore aligned with said screw for the reception of means forturning the screw.

ERNST TOENNIESSEN.

